use below code to add js/css in your wordpress header or footer put in code in function.php function add_theme_scripts() { wp_enqueue_style( 'style', get_stylesheet_uri() ); wp_enqueue_style( 'slider', get_template_directory_uri() . '/css/slider.css', array(), '1.1', 'all'); wp_enqueue_script( 'script', get_template_directory_uri() . '/js/script.js', array ( 'jquery' ), 1.1, true); if ( is_singular() && comments_open() && get_option( 'thread_comments' ) ) { wp_enqueue_script(...Read More